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How to update edittext whenever a quantity is added in android studio

I am working on android studio. I am using fragments to make the app workflow. The app is basically for order taking. One customer can have more than one order. So for it, I have used RecyclerView. Below is my GUI
What do I want to do?
I want to update my Total Qty and Order Value in such a way that whenever the user enters the quantity both edittexts should be updated. For example, in the above image, I searched for one product, its rate is 287.30 and when I entered the quantity 5 then Total Qty: 5 and Order Value: 287.30. After that, I select another product and enter its quantity 8 then both edit text should be updated like Total Qty: 13 and Order Value: 509.15, and when I remove any product then it should subtract the total quantity and order value.
The Total Qty: and Order Value: is in my main fragment. Below is my code
Fragment Layout
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/products"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:focusable="true" />
</LinearLayout>
<LinearLayout
android:id="#+id/product_info"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:orientation="horizontal"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tv_product">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Total Qty:" />
<EditText
android:id="#+id/total_qty"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="center_horizontal"
android:hint=""
android:inputType="number" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Order Value :" />
<EditText
android:id="#+id/order_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="center_horizontal"
android:hint=""
android:inputType="none" />
</LinearLayout>
</LinearLayout>
Fragment Code
// created getter setters
public EditText totalQty,totalOrder;
public EditText getTotalQty(){
return totalQty;
}
public void setTotalQty(EditText et){
this.totalQty = et;
}
public EditText getTotalOrder(){return totalOrder;}
public void setTotalOrder(EditText ett){this.totalOrder=ett;}
addProduct.setOnClickListener(v -> {
mProducts.add(new ProductDetail());
mProductsAdapter.setProducts(mProducts);
productsRecyclerView.smoothScrollToPosition(mProducts.size() - 1);
});
Product Layout
<AutoCompleteTextView
android:id="#+id/tv_product"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:gravity="start"
android:hint="Enter Product"
android:inputType="text"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="#+id/product_info"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:orientation="horizontal"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tv_product">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="vertical">
<EditText
android:id="#+id/prod_qty"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="true"
android:focusableInTouchMode="true"
android:gravity="left"
android:hint="Enter Quantity"
android:inputType="number" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="vertical">
<EditText
android:id="#+id/prod_price"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="left"
android:hint="Prod Price"
android:inputType="numberDecimal" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="vertical">
<EditText
android:id="#+id/prod_specs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="left"
android:hint="Prod Specs"
android:inputType="none" />
</LinearLayout>
</LinearLayout>
<Button
android:id="#+id/btn_rmv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="1dp"
android:layout_marginBottom="1dp"
android:text="Remove Product"
android:textColor="#color/white"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/product_infos" />
Product Adapter
View productView = inflater.inflate(R.layout.product_layout, parent, false);
ProductViewHolder viewHolder = new ProductViewHolder(productView);
viewHolder.tvProduct.setAdapter(prodAdapter);
viewHolder.tvProduct.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
}
#Override
public void afterTextChanged(Editable s) {
mProductManager = new ProductManager(context);
int position = viewHolder.getAdapterPosition();
if (position != -1) {
ProductDetail productDetail = mProductManager.getProductByPrdName(s.toString());
mProducts.get(position).setProductNameFull(s.toString());
viewHolder.price.setText(productDetail.getPrice());
viewHolder.spec.setText(productDetail.getProductSpec());
viewHolder.pgrp.setText(productDetail.getProductGroup());
viewHolder.ccode.setText(productDetail.getCompanyCode());
viewHolder.cname.setText(productDetail.getCompanyName());
viewHolder.pcode.setText(productDetail.getProductCode());
}
}
});
viewHolder.quantity.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
int position = viewHolder.getAdapterPosition();
if (position != -1) {
Integer val = null;
try {
val = Integer.valueOf(s.toString());
} catch (Exception e) {
}
mProducts.get(position).setQuantity(val);
}
}
});
viewHolder.removeBtn.setOnClickListener(v -> {
int position = viewHolder.getAdapterPosition();
if (position != -1) {
mProducts.remove(position);
notifyItemRemoved(position);
}
});
return viewHolder;
Update 1
Below is my Fragment Class
public class SurveyFormFragment extends Fragment {
.
.
.
.
private final LiveData<Integer> mQuantity = new MutableLiveData<>(0);
private final LiveData<Integer> mOrderValue = new MutableLiveData<>(0);
private ViewModel mViewModel;
private FragmentBinding mBinding;
#RequiresApi(api = Build.VERSION_CODES.M)
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d("myfragment", "onCreateView");
getActivity().setTitle(getString(R.string.title_new_survey));
mContext = getActivity();
if (view == null) {
view = inflater.inflate(R.layout.new_survey_form_layout, container, false);
mLinearLayout = view.findViewById(R.id.ll_prod);
this.initElements(view);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
this.initListeners(getActivity());
}
Bundle arguments = getArguments();
if (arguments != null && arguments.containsKey("booking_id")) {
isNewSurvey = false;
initSurveyData(arguments.getString("booking_id"));
this.updatingSurveyId = arguments.getString("booking_id");
}
}
Log.d("package", getActivity().getPackageName());
Log.d(TAG, Common.getCarrierName(getActivity()));
return view;
}
#Override
public void onStart() {
super.onStart();
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.d("myfragment", "onActivityCreated");
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
Log.d("myfragment", "onCreate");
}
#Override
public void onDestroy() {
super.onDestroy();
Log.d("myfragment", "onDestroy");
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState) {
//save now
savedInstanceState.putString("faisal_qayyum", consumerNameEditText.getText().toString());
super.onSaveInstanceState(savedInstanceState);
Log.d("myfragment", "onSaveInstanceState saving " + consumerNameEditText.getText().toString());
}
#Override
public void onViewStateRestored(Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
//restore now
Log.d("myfragment", "onViewStateRestored");
}
.
.
.
.
}
Error
How can I add and then update the values?
Any help would be highly appreciated.

I will disappoint you by not sharing code. I will share you a simple graphic of what you need to do.
[Fragment]: displays your list of orders. When an event is triggered (user tapped something or changed something), forwards this event to a ViewModel. Also Observes for the ViewModel data state.
[ViewModel]: exposes a series of functions to listen for user events (e.g. the user tapped this order, or the user changed the quantity of this order to NN, etc.). Also offers a LiveData (or Flow) with the State and Data your Fragment needs. Maybe even talks to the repository where this data originates from (where you save your Orders in your persistent or backend).
Interactions:
When the UI modified something, you tell the viewModel: "This data changed, the order X, now has a quantity of Y".
The ViewModel will process this, update the State of the screen, and send the new data via your Livedata/Flow that the Fragment observes.
When the Fragment receives this new data, it will update the UI accordingly, as that's its most important job.
This whole thing has been greatly documented in the official Android recommended architecture guides. I suggest you start from there instead of trying to fight the framework and making your life more complicated.

implement interface between adapter and fragment like this (it is just sodu to tell how you have to implement things also you have to check it out how to implement interfaces
===============================================================
public frgment extends Fragment implements GetValueInterface{
in onCreate function{
int totalquantity;
call this after adapter initialization
adapter.registergetValueInterface(this)
}
#Override Void setQuantity(Int _gotquantity){
_gotquantity+=_gotquantity;
totalquantityedittext.setText(_gotquantity,TextView.BufferType.EDITABLE)
}
}
and in adapter class
Adapter class
{
public GetValueInterface instance;
function registergetValueInterface(GetValueInterface obj){
instance=obj;
}
//and in quantity edittext text watcher
call instance.setQuantity(quanity)
}
like this you can minus the quantity as well on removal of item

Actually it's releated with Interactions like LiveData.
But rather than write a looot of code, simply I'm passing runnable to childs for call it when somethink changed :)
For example:
class Root{
...
public void addItem(){
ItemController cont = new ItemController(() -> updateSums());
...
}
public void updateSums(){
//TODO
}
}
class ItemController{
Runnable updater;
public ItemController(Runnable updater){
this.updater = updater;
}
public void onSomethingChanged(){
updater.run();
}
}

You should work with LiveData and DataBinding
In order to do so you activate it in your build.gradle file:
android {
...
buildFeatures {
dataBinding true
}
}
Then add the following code.
Add a ViewModel class:
public class ViewModel extends AndroidViewModel
{
private final MediatorLiveData<Integer> mTotalQuantity = new MediatorLiveData<>();
private final MediatorLiveData<Integer> mTotalOrder = new MediatorLiveData<>();
private final List<LiveData<Integer>> mOrders = new ArrayList<>();
private final List<LiveData<Integer>> mQuantities = new ArrayList<>();
public ViewModel(#NonNull Application application)
{
super(application);
mTotalOrder.setValue(0);
mTotalQuantity.setValue(0);
}
public LiveData<Integer> getTotal()
{
return mTotalOrder;
}
public LiveData<Integer> getQuantity()
{
return mTotalQuantity;
}
public void attachQuantity(LiveData<Integer> quantity)
{
mQuantities.add(quantity);
mTotalQuantity.addSource(quantity, (q) -> calculateQuantities());
}
public void detachQuantity(LiveData<Integer> quantity)
{
mQuantities.remove(quantity);
mTotalQuantity.removeSource(quantity);
calculateQuantities();
}
private void calculateQuantities()
{
int total = 0;
for (LiveData<Integer> quantity : mQuantities)
{
Integer value = quantity.getValue();
if (value != null)
{
total += value;
}
}
mTotalQuantity.setValue(total);
}
public void attachTotal(LiveData<Integer> total)
{
mOrders.add(total);
mTotalOrder.addSource(total, (q) -> calculateOrders());
}
public void detachTotal(LiveData<Integer> total)
{
mOrders.remove(total);
mTotalOrder.removeSource(total);
calculateOrders();
}
private void calculateOrders()
{
int total = 0;
for (LiveData<Integer> order : mOrders)
{
Integer value = order.getValue();
if (value != null)
{
total += value;
}
}
mTotalOrder.setValue(total);
}
}
In your fragment class add the following:
private LiveData<Integer> mQuantity = new MutableLiveData<>(0);
private LiveData<Integer> mOrderValue = new MutableLiveData<>(0);
private ViewModel mViewModel;
private FragmentBinding mBinding;
#Override
public void onCreate(#Nullable Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mViewModel = new ViewModelProvider(requireActivity()).get(ViewModel.class);
mViewModel.attachQuantity(mQuantity);
mViewModel.attachTotal(mOrderValue);
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState)
{
mBinding = DataBindingUtil.setContentView(this, R.layout.fragment);
mBinding.quantity = mQuantity;
mBinding.order_value = mOrderValue;
}
#Override
public void onDestroy()
{
super.onDestroy();
mViewModel.detachQuantity(mQuantity);
mViewModel.detachTotal(mOrderValue);
}
Add this to your product layout:
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="quantity"
type="android.arch.lifecycle.MutableLiveData<Integer>" />
<variable
name="order_value"
type="android.arch.lifecycle.MutableLiveData<Integer>" />
</data>
...
<EditText
android:id="#+id/prod_qty"
// This does the magic
android:text="#{quantity}" />
...
<EditText
android:id="#+id/prod_price"
// And this of course...
android:text="#{order_value}" />
...
</layout>
And this to your fragment layout:
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="viewmodel"
type="yourpackage.ViewModel" />
</data>
...
<EditText
android:id="#+id/total_qty"
// This does the magic
android:text="#{viewmodel.quantity}" />
...
<EditText
android:id="#+id/order_value"
// And this of course..
android:text="#{viewmodel.total}" />
...
</layout>
Note that in both classes you need to get the viewmodel from the activity, not from the fragment itself, so you share the same viewmodel for both classes:
ViewModelProvider(requireActivity()).get(ViewModel.class);
If you only get values of LiveData objects from within the UI Thread (which is the case in my code, as onChange of LiveData and binding updates are always called from the UI thread), you do not need to synchronize the lists in the ViewModel. Otherwise you need to make the whole story thread safe.

It is easy to understand that you want to take action when changing the value in a text field. So the first thing is to add a TextChangeListener or TextWatcher. Then, you have to work on the received text value to update the rest of the dependencies: Your product list or whatever it is.
Just a few basic things you need to take care of:
If you are working with fragment communication, propagate your changes by reloading in onResume of the fragment or activity. Or you can use EventBus or any other suitable mechanism.
Be sure to notify the adapter once you have changed the underlying data. I see a call to "notify**" after your code mProducts.get(position).setQuantity(val); is missing in your Product adapter. When modifying the underlying data, it is necessary to notify the adapter using "notify**" calls to update the recycler view.
The MutableLiveData error you posted above can be cleared with MutableLiveData declaration such as private final MutableLiveData mutableData = new MutableLiveData(0) in your case. You can have a function to just return LiveData as LiveData getData() { return mutableData; }

Android Java RecyclerView Error: No adapter attached; skipping layout [duplicate]

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I'm trying to show all user posts that the user who is using the app follows, and I'm using Firestore. I take all the ids and put them on an arraylist and build a query. I am using FirebaseRecyclerView but I have this error:
2021-06-13 16:33:29.177 22744-22744/com.conta.pophome E/RecyclerView: No adapter attached; skipping layout
I don't think it's an error due to the java code (I'm not fully sure, but I think it is) but I think it's due to the graphics (xml).
graphic code:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
>
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/primaryPopHome"
android:minHeight="?attr/actionBarSize"
android:theme="#style/AppTheme.bar">
<ImageView
android:layout_width="40dp"
android:layout_height="40dp"
android:scaleType="centerInside"
android:src="#drawable/poplogo"
/>
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="300dp"
android:innerRadius="0dp"
android:shape="ring"
android:thicknessRatio="1.9"
app:cardCornerRadius="80dp">
<ImageView
android:id="#+id/img_profilomain"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:backgroundTint="#color/white"
android:scaleType="centerCrop"
/>
</androidx.cardview.widget.CardView>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/add_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp"
android:src="#drawable/poplike"
android:backgroundTint="#color/redButton2"
app:borderWidth="0dp"
app:fabSize="normal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<!--Floating action button for add alarm-->
<!--Make sure that you are constraining this
button to the parent button-->
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/add_alarm_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
app:fabSize="normal"
app:layout_constraintBottom_toTopOf="#+id/add_fab"
app:layout_constraintEnd_toEndOf="#+id/add_fab"
app:layout_constraintStart_toStartOf="#+id/add_fab"
app:srcCompat="#drawable/ic_baseline_add_24"
app:borderWidth="0dp"
android:backgroundTint="#color/redButton2"
/>
<!--Action name text for the add alarm button-->
<!--Make sure that you are constraining this Text to
the add Alarm FAB button-->
<TextView
android:id="#+id/add_alarm_action_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:text="Crea Post"
app:layout_constraintBottom_toBottomOf="#+id/add_alarm_fab"
app:layout_constraintEnd_toStartOf="#+id/add_alarm_fab"
app:layout_constraintTop_toTopOf="#+id/add_alarm_fab" />
<!--Floating action button for add person-->
<!--Make sure that you are constraining this
button to the add Alarm FAB button-->
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/add_person_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
app:fabSize="normal"
app:layout_constraintBottom_toTopOf="#+id/add_alarm_fab"
app:layout_constraintEnd_toEndOf="#+id/add_alarm_fab"
app:layout_constraintStart_toStartOf="#+id/add_alarm_fab"
app:srcCompat="#drawable/ic_baseline_search_24"
app:borderWidth="0dp"
android:backgroundTint="#color/redButton2"
/>
<!--Action name text for the add person button-->
<!--Make sure that you are constraining this Text
to the add Person FAB button-->
<TextView
android:id="#+id/add_person_action_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:text="Cerca utenti"
app:layout_constraintBottom_toBottomOf="#+id/add_person_fab"
app:layout_constraintEnd_toStartOf="#+id/add_person_fab"
app:layout_constraintTop_toTopOf="#+id/add_person_fab" />
<Button
android:id="#+id/btn_logout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="152dp"
android:text="Logout"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/appBarLayout"
app:layout_constraintVertical_bias="0.111" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rcViewPostMain"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="56dp"
app:layout_constraintTop_toBottomOf="#+id/appBarLayout"
tools:layout_editor_absoluteX="-16dp" />
</androidx.constraintlayout.widget.ConstraintLayout>
and this is the java code:
public class MainActivity extends AppCompatActivity {
private FirebaseAuth fAuth;
private DatabaseReference dbRef;
private DatabaseReference uri;
private RecyclerView findPost;
FloatingActionButton mAddFab, mAddAlarmFab, mAddPersonFab;
// These are taken to make visible and invisible along
// with FABs
TextView addAlarmActionText, addPersonActionText;
// to check whether sub FAB buttons are visible or not.
Boolean isAllFabsVisible;
private ArrayList<String> Uidrecord = new ArrayList<>();
private ArrayList<String> uidFollowing = new ArrayList<>();
/*
private String [] Uidrecord = new String[1000];
private String[] uidFollowing = new String[1000];*/
int cont = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
overridePendingTransition(0, 0);
findPost = findViewById(R.id.rcViewPostMain);
fAuth = FirebaseAuth.getInstance();
// Register all the FABs with their IDs
// This FAB button is the Parent
mAddFab = findViewById(R.id.add_fab);
// FAB button
mAddAlarmFab = findViewById(R.id.add_alarm_fab);
mAddPersonFab = findViewById(R.id.add_person_fab);
// Also register the action name text, of all the FABs.
addAlarmActionText = findViewById(R.id.add_alarm_action_text);
addPersonActionText = findViewById(R.id.add_person_action_text);
// Now set all the FABs and all the action name
// texts as GONE
mAddAlarmFab.setVisibility(View.GONE);
mAddPersonFab.setVisibility(View.GONE);
addAlarmActionText.setVisibility(View.GONE);
addPersonActionText.setVisibility(View.GONE);
// make the boolean variable as false, as all the
// action name texts and all the sub FABs are invisible
isAllFabsVisible = false;
// We will make all the FABs and action name texts
// visible only when Parent FAB button is clicked So
// we have to handle the Parent FAB button first, by
// using setOnClickListener you can see below
mAddFab.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
if (!isAllFabsVisible) {
// when isAllFabsVisible becomes
// true make all the action name
// texts and FABs VISIBLE.
mAddAlarmFab.show();
mAddPersonFab.show();
addAlarmActionText.setVisibility(View.VISIBLE);
addPersonActionText.setVisibility(View.VISIBLE);
// make the boolean variable true as
// we have set the sub FABs
// visibility to GONE
isAllFabsVisible = true;
} else {
// when isAllFabsVisible becomes
// true make all the action name
// texts and FABs GONE.
mAddAlarmFab.hide();
mAddPersonFab.hide();
addAlarmActionText.setVisibility(View.GONE);
addPersonActionText.setVisibility(View.GONE);
// make the boolean variable false
// as we have set the sub FABs
// visibility to GONE
isAllFabsVisible = false;
}
}
});
// below is the sample action to handle add person
// FAB. Here it shows simple Toast msg. The Toast
// will be shown only when they are visible and only
// when user clicks on them
mAddPersonFab.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this, ricerca.class));
}
});
// below is the sample action to handle add alarm
// FAB. Here it shows simple Toast msg The Toast
// will be shown only when they are visible and only
// when user clicks on them
mAddAlarmFab.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this, posta.class));
}
});
if(fAuth.getCurrentUser() == null) {
startActivity(new Intent(MainActivity.this, accesso.class));
return;
}
ImageView img_profilo = findViewById(R.id.img_profilomain);
dbRef = FirebaseDatabase.getInstance().getReference("Users");
uri = dbRef.child(fAuth.getCurrentUser().getUid()).child("url");
Button btn_logout = findViewById(R.id.btn_logout);
btn_logout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
fAuth.signOut();
startActivity(new Intent(MainActivity.this, accesso.class));
}
});
showImage();
FirebaseFirestore.getInstance().collection("following").document(FirebaseAuth.getInstance().getCurrentUser().getUid()).collection("userFollowing").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
for (QueryDocumentSnapshot document : task.getResult()) {
document.getData();
Uidrecord.add(cont,String.valueOf(document.getData()));
cont++;
}
int conta = 0;
for (String item: Uidrecord){
if(item == null)
break;
uidFollowing.add(conta,getFollowingUid(item));
Toast.makeText(MainActivity.this, uidFollowing.get(conta), Toast.LENGTH_SHORT).show();
conta++;
}
} else {
Toast.makeText(MainActivity.this, task.getException().toString(), Toast.LENGTH_SHORT).show();
}
}
});
findPost.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
onStart();
}
#Override
protected void onStart() {
super.onStart();
Query query = FirebaseFirestore.getInstance()
.collection("post/" + uidFollowing + "/userPosts")
.limit(1000);
FirestoreRecyclerOptions<GetInfoPost> options = new FirestoreRecyclerOptions.Builder<GetInfoPost>()
.setQuery(query, GetInfoPost.class)
.build();
FirestoreRecyclerAdapter<GetInfoPost, FindFriendsViewHolder> firestoreRecyclerAdapter = new FirestoreRecyclerAdapter<GetInfoPost, FindFriendsViewHolder>(options) {
#Override
protected void onBindViewHolder(#NonNull FindFriendsViewHolder holder, int position, #NonNull GetInfoPost model) {
holder.txtTitoloInPost.setText(model.getTitle() + " " + model.getValutation() + "/10");
holder.txtData.setText(model.getdate());
Picasso.get().load(model.getUrlImage()).into(holder.imgPost);
holder.txtDescrizione.setText(model.getDescription());
holder.txtTag.setText(model.getGenre());
}
#NonNull
#Override
public FindFriendsViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.post, parent, false);
return new FindFriendsViewHolder(view);
}
};
findPost.setAdapter(firestoreRecyclerAdapter);
firestoreRecyclerAdapter.startListening();
}
public static class FindFriendsViewHolder extends RecyclerView.ViewHolder {
TextView nameInPost, txtData, txtTag, txtTitoloInPost, txtLikenmb, txtDescrizione;
ImageView img_profinPost, imgPost, imgLike;
RelativeLayout cardView;
GifImageView gifLike;
public FindFriendsViewHolder(#NonNull View itemView) {
super(itemView);
nameInPost = itemView.findViewById(R.id.nameInPost);
txtData = itemView.findViewById(R.id.txtData);
txtTag = itemView.findViewById(R.id.txtTag);
txtTitoloInPost = itemView.findViewById(R.id.txtTitoloInPost);
txtLikenmb = itemView.findViewById(R.id.txtLikenmb);
txtDescrizione = itemView.findViewById(R.id.txtDescrizione);
img_profinPost = itemView.findViewById(R.id.img_profinPost);
imgPost = itemView.findViewById(R.id.imgPost);
cardView = itemView.findViewById(R.id.card_viewR);
gifLike = itemView.findViewById(R.id.gifLike);
imgLike = itemView.findViewById(R.id.imgLike);
}
}
#Override
public void onBackPressed() {
}
private void showImage() { //mostro l'immagine usando picasso con l'url nel child url del profilo
ImageView img_prof = findViewById(R.id.img_profilomain);
uri.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
String url = snapshot.getValue(String.class);
// Toast.makeText(getApplicationContext(), url, Toast.LENGTH_SHORT).show();
Picasso.get().load(url).into(img_prof);
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
private String getFollowingUid(String result){
int stringLength = result.length();
String tmp = result.substring(7, stringLength-1);
return tmp;
}
}
I tried to read the other similar questions but could not pinpoint the cause of my problem.
Would you help me understand what I'm doing wrong?
Edits:
I tried putting the recycler view adapter in onCreate but it still doesn't work -> https://codeshare.io/wndbEB

You need to set your recyclerView on the main thread. Try to put the recyclerView in onCreate() and the .startListening() in the onStart.

How to select item from ImageView in ScrollView?

Please bear with me as I am new to android studio. I want to make a ScrollView containing images with corresponding name (TextView). I want to be able to select an image by touching it in the ScrollView, but I don't know how. I have implemented the ScrollView like this, I also want to be able to add pictures with a name attached to them.
Main_activity.xml
<HorizontalScrollView
android:id="#+id/scrollFilterView"
android:layout_width="fill_parent"
android:layout_height="130dp"
android:scrollbars="none"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.57"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0">
<LinearLayout
android:id="#+id/gallery"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal" />
</HorizontalScrollView>
scrollview.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/filterView"
android:layout_width="90dp"
android:layout_height="90dp"
app:srcCompat="#android:drawable/sym_def_app_icon"
android:contentDescription="filterView" />
<TextView
android:id="#+id/textFilter"
android:layout_width="90dp"
android:gravity="center"
android:layout_height="wrap_content"
android:text="textFilter" />
MainActivity.java
LayoutInflater inflater = LayoutInflater.from(this);
for (int i = 0; i < NUMBER_OF_FILTERS_GRID; i++ ) {
View scrollView = inflater.inflate(R.layout.scrollview, gallery, false);
TextView textview = scrollView.findViewById(R.id.textFilter);
textview.setText("Filter "+ i);
ImageView filterView = scrollView.findViewById(R.id.filterView);
filterView.setImageResource(R.mipmap.ic_launcher);
gallery.addView(scrollView);
}
}
Some input to if this is the right path to take and what functions i should use is very appreciated :)

Use a RecyclerView instead of a ListView, and used with and adapter, this will grant you more control over each item displayed on the list (in this case in the RecyclerView),
you will need to create and Adapter class, a simple class for your Items and a new XML layout that will serve as the model of each item in the list.
Simple class for your items:
public class dataSetItem {
private Integer image;
private String listItemText;
public Integer getImage() {
return image;
}
public void setImage(Integer image) {
this.image = image;
}
public String getListItemText() {
return listItemText;
}
public void setListItemText(String listItemText) {
this.listItemText = listItemText;
}
}
In your mainActivity remove the listView and for loop, use this instead:
public class MyActivity extends Activity {
private RecyclerView recyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager layoutManager;
private ArrayList mAdapter = new ArrayList();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
recyclerView = (RecyclerView) findViewById(R.id.your_recycler_view);
mDataset.add(dataSetItem("item 1", R.mipmap.ic_launcher))
mDataset.add(dataSetItem("item 2", R.mipmap.ic_launcher))
// You can add more items to the mDataset list and call the adapter again to update the RecyclerView
// use a linear layout manager
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
// specify an adapter (see also next example)
mAdapter = new MyAdapter(myDataset);
recyclerView.setAdapter(mAdapter);
}
// ...
}
Create this XML layout which will serve as the model for each item, called my_item_list_layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_height="wrap_content"
android:layout_width="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="center">
<ImageView
android:id="#+id/the_image_i_want_to_click"
android:layout_width="80dp"
android:layout_margin="10dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:background="#color/ADRBlack"
/>
<TextView
android:id="#+id/item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="220dp"
android:textColor="#color/Black"
android:textSize="16sp"
tools:text="Example Restaurant" />
</LinearLayout>
</LinearLayout>
Now the adapter class, in this case called MyAdapter:
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private customItem[] mDataset;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class MyViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView textView;
public MyViewHolder(TextView v) {
super(v);
textView = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(customItem[] myDataset) {
mDataset = myDataset;
}
// Create new views (invoked by the layout manager)
#Override
public MyAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
TextView v = (TextView) LayoutInflater.from(parent.getContext())
.inflate(R.my_item_list_layout, parent, false);
MyViewHolder vh = new MyViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
holder.textView.setText(mDataset[position].getListItemText);
holder.textView.setBackground(mDataset[position].getImage);
//Now to do something when you clic the image use this
holder.textView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View v) {
//Your action here
}
});
}
// Return the size of your dataset (invoked by the layout manager)
#Override
public int getItemCount() {
return mDataset.length;
}
}

ListView scroll up bug using SmoothRefreshLayout

I've implemented SmoothRefreshLayout library in my application, which has at the moment a simple ListView.
The problem occurs when I scroll down the ListView and, when I try to get to the top of it, instead of scrolling up, it invokes the Refresh listener. So the movement is stuck.
This is the activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<me.dkzwm.widget.srl.SmoothRefreshLayout
android:id="#+id/smoothRefreshLayout"
android:layout_width="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ProgressBar
android:id="#+id/progressBar"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerInParent="true"
android:indeterminateDrawable="#drawable/circular_spinner" >
</ProgressBar>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/lv"
/>
</RelativeLayout>
</me.dkzwm.widget.srl.SmoothRefreshLayout>
And this is the part of the RefreshListener in the onCreate:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSupportActionBar().setTitle("");
setContentView(R.layout.activity_main);
refreshLayout = (SmoothRefreshLayout)findViewById(R.id.smoothRefreshLayout);
refreshLayout.setHeaderView(new MyCustomHeader(this));
refreshLayout.setEnabled(true);
refreshLayout.setOnRefreshListener(new RefreshingListenerAdapter() {
#Override
public void onRefreshBegin(boolean isRefresh) {
if (isNetworkAvailable(MainActivity2.this)) {
isRef = true;
new upd().execute();
} else {
Toast.makeText(MainActivity2.this, getResources().getString(R.string.err_conn), Toast.LENGTH_SHORT).show();
}
}
});

I know it has no sense to self reply, but it may help someone else.
Anyway, the solution has been simple, I have just implemented an onScrollListener and checked if first item was on the top, if not just disable the Refresher.
listView.setOnScrollListener(new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
#Override
public void onScroll(AbsListView listView, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int rowpos = (listView == null || listView.getChildCount() == 0) ?
0 : listView.getChildAt(0).getTop();
refreshLayout.setEnabled((rowpos >= 0));
}
});
Credits: Can't scroll in a ListView in a swipeRefreshLayout

ListView items not responding to tap

I'm just getting my feet wet with Android and have built a UI that contains a TabHost with three tabs. Each tab is powered by its own Activity. The first Tab contains a listview with a prepopulated set of rows and is built from a custom ArrayAdapter.
The problem I'm running into is that none of the ListView rows are tappable. In other words, when I tap on them there is no orange selection. If I use the scroll ball on my Nexus One it will select, but any touch gestures don't seem to be responding.
All the UI is being handled using XML files with a main.xml housing the TabHost -> LinearLayout -> TabWidget/FrameLayout and a nearby_activity.xml file containing my ListView UI
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="#string/nearby_no_events"
/>
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1.0"
android:choiceMode="multipleChoice"
android:divider="#d9d9d9"
android:dividerHeight="1px"
android:cacheColorHint="#eee"
/>
</LinearLayout>
And the relevant code from my Activity that is set to show in the selected tab.
public class NearbyActivity extends ListActivity
{
private ArrayList<Event> m_events = null;
private EventAdapter m_adapter = null;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.nearby_activity);
getEvents();
this.m_adapter = new EventAdapter(this, R.layout.eventrow, m_events);
setListAdapter(this.m_adapter);
}
private void getEvents()
{
m_events = new ArrayList<Event>();
for (int i = 0; i < 100 ; i++)
{
Event e = new Event();
e.setEventName("Event " + i);
e.setVenueName("Staples Center");
e.setStartDate(new Date());
m_events.add(e);
}
}
private class EventAdapter extends ArrayAdapter<Event>
{
private ArrayList<Event> items;
public EventAdapter(Context context, int textViewResourceId, ArrayList<Event> items)
{
super(context, textViewResourceId, items);
this.items = items;
}
#Override
public View getView (int position, View convertView, ViewGroup parent)
{
View v = convertView;
if (v == null)
{
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.eventrow, null);
}
Event e = items.get(position);
if (e != null)
{
TextView nameText = (TextView)v.findViewById(R.id.eventName);
TextView venueNameText = (TextView)v.findViewById(R.id.venueName);
if (nameText != null)
{
nameText.setText(e.getEventName());
}
if(venueNameText != null)
{
venueNameText.setText(e.getVenueName());
}
}
return v;
}
}
}
My listview row's are populated by an XML file as well.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:orientation="vertical"
android:padding="4dip">
<TextView
android:id="#+id/eventName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:inputType="text"
android:singleLine="true"
android:ellipsize="marquee"
android:textSize="18sp"
android:textColor="#000"
/>
<TextView
android:id="#+id/venueName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/eventName"
android:layout_alignParentBottom="true"
android:layout_marginRight="55dip"
android:singleLine="true"
android:ellipsize="end"
android:scrollHorizontally="true"
android:textSize="13sp"
android:textColor="#313131"
android:layout_alignWithParentIfMissing="true"
android:gravity="center_vertical"
/>
</RelativeLayout>
Thanks for any help you can offer.

You want a Listview tappable, well you need implement the method onListItemClick()
#Override
protected void onListItemClick(ListView l, View v, final int position, long id) {
super.onListItemClick(l, v, position, id);
Toast.makeText(this, "This is my row number " + position,Toast.LENGTH_LONG).show();
}
and to ensure the orange colour you must set the property
android:focusable="false"
in your Listview Row.xml